"The time to move Sheboygan forward has come. I intend to run for mayor to restore integrity of the mayor's office as well as accountability and transparency at City Hall," Heimermann said in a news release.

Heimermann is a senior at Sheboygan South High School and owner of Sheboygan Communications, a diversified small business dedicated to marketing, web design and interactive media.

Organizers of a recall effort against Ryan handed in more than 4,700 signatures last week.

Hillary Clinton's office said "nothing nefarious was at play" when the former secretary of state used her personal email address, rather than one provided by the State Department, during her four years as America's top diplomat.